artifacts.add(artifact);
    }

    public Object getKey() {
        return getGroupId() + ':' + getArtifactId() + ':' + getVersion();
    }

    public static Object getKey(Artifact artifact) {
        return artifact.getGroupId() + ':' + artifact.getArtifactId() + ':' + artifact.getBaseVersion();
    }

    protected String getKey(String classifier, String extension) {
        return classifier + ':' + extension;

                                next = new Entry<String, String>() {
                                    @Override
                                    public String getKey() {
                                        return (String) e.getKey();
                                    }

                                    @Override
                                    public String getValue() {

                for (Map.Entry<String, String> entry : System.getenv().entrySet()) {
                    String key = "env."
                            + (caseSensitive ? entry.getKey() : entry.getKey().toUpperCase(Locale.ENGLISH));
                    tmp.setProperty(key, entry.getValue());
                }
                envVars = tmp;
            }

            props.putAll(envVars);
        }

            metadata = metadata.withPlugins(new ArrayList<>(recessive.getPlugins()));
        }
    }

    public Object getKey() {
        return getGroupId() + ':' + getArtifactId();
    }

    public static Object getKey(Artifact artifact) {
        return artifact.getGroupId() + ':' + artifact.getArtifactId();
    }

    @Deprecated
    @Override

        }

        public Object getKey() {
            return metadata.toString();
        }

        public String getRemoteFilename() {
            return metadata.getType();
        }

        public String getLocalFilename(ArtifactRepository repository) {
            return insertRepositoryKey(getRemoteFilename(), repository.getKey());
        }

        Map.Entry<Artifact, Path> resolved = session.resolveArtifact(coord);
        assertNotNull(resolved);
        assertNotNull(resolved.getKey());
        assertNotNull(resolved.getValue());
        Optional<Path> op = session.getArtifactPath(resolved.getKey());
        assertTrue(op.isPresent());
        assertEquals(resolved.getValue(), op.get());
    }

    @Test
    void testBuildProject() {

    public String getGoal() {
        return delegate.getGoal();
    }

    @Override
    public Optional<XmlNode> getConfiguration() {
        return Optional.of(delegate.getConfiguration()).map(Xpp3Dom::getDom);
    }

    @Override
    public String toString() {
        return delegate.toString();
    }

        return packages;
    }

    /**
     * The key that can must used to identify the configuration using the
     * {@link javax.inject.Named} annotation.
     */
    public String getKey() {
        return key;
    }

    /**
     * Returns the configuration for this extension.
     */
    public XmlNode getConfiguration() {
        return configuration;
    }

     *
     * @return The POM whose build plugins are to be scanned for the prefix or {@code null} to only search the plugin
     *         repositories.
     */
    Model getPom();

    /**
     * Sets the POM whose build plugins are to be scanned for the prefix.
     *
     * @param pom The POM whose build plugins are to be scanned for the prefix, may be {@code null} to only search the

     */
    public void flushPluginMap() {
    }

    /**
     * @return a Map of plugins field with {@code Plugins#getKey()} as key
     * @see Plugin#getKey()
     */
    public Map<String, Plugin> getPluginsAsMap() {
        return getPlugins().stream().collect(Collectors.toMap(plugin -> plugin.getKey(), plugin -> plugin));
    }
            ]]>
          </code>
        </codeSegment>
        <codeSegment>